Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 215)

COMMISSIONING 9-15
1557-UM050F-EN-P – June 2013
LOGIC POWER SUPPLY TESTS
1. Remove all the gate driver power supply leads, and all power supply connections to the printed circuit
cards.
2. Inspect the low voltage terminal block, measure the 120/240 Volt supply voltages to be sure they are in
limits. Record the voltages.
TEST POINT EXPECTED VOLTAGE (AC) MEASURED VOLTAGE (AC)
WIRE NUMBER D60 TO D61 90 TO 132 VOLTS
WIRE NUMBER D-- TO D-- 180 TO 264 VOLTS
3. Turn on the low voltage breaker (CB1), this will power up the 50VDC logic power supply. Take the
readings at the DC to DC converter terminal blocks. Record the voltages in the table below:
FUNCTION TEST POINT EXPECTED VOLTAGE (DC) MEASURED VOLTAGE (DC)
TACHOMETER WIRE NUMBER D59 TO D58 +15
LEMS
WIRE NUMBER D56 TO D57 +24

3%
WIRE NUMBER D55 TO D57 -24

3%
DCB
WIRE NUMBER D54 TO D53 5.1V TO 5.3V
WIRE NUMBER D52 TO D51 +15V ± 3% (1A)
WIRE NUMBER D50 TO D51 - 15V ± 3% (1A)
TRANSDUCERS AND
PRINTER
WIRE NUMBER D48 TO D49 +24
SCANBUS WIRE NUMBER D46 TO D47 +12
DC POWER INPUT WIRE NUMBER D44 TO D45 +50